Rakuen is an adventure game about a little Boy who lives in the hospital. One day, the Boy asks his Mom to escort him to the fantasy world from his favorite storybook, so that he can ask the Guardian of the Forest to grant him one wish. In order to receive his wish, the Boy must complete a set of challenges that revolve around helping his neighbors in the hospital by interacting with their alter-egos in the fantasy world...

...A cranky old man who guards a broken music box with his life while complaining that he never gets any visitors; a young woman in a coma whose husband hasn’t left her side in months; a little girl who laments over a friend she was never able to say goodbye to after growing ill… The Boy slowly begins to realize that his neighbors are plagued by secrets and struggles that are mysteriously tied to the strange hospital.